triggerSearch (local state, filter change) and buildPageHref (server data,
page nav) were each iterating over the same ~10 filter params. Any new
filter would have had to land in two places. buildSearchParams is now the
single source of truth for which params the /documents URL understands;
both callers just pass their snapshot and an optional targetPage. (#316)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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